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Pilot Research on Fluorochemical Wastewater Containing Chloromethane by Iron Reduction/flocculation Process

Author: ZhouHuaDong
Tutor: WuZhongBiao；GuanBaoHong
School: Zhejiang University
Course: Chemical Engineering
Keywords: Iron reduction Flocculation Wastewater treatment Chloroform Carbon tetrachloride
CLC: X783
Type: Master's thesis
Year: 2006
Downloads: 162
Quote: 0
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Abstract


To the emissions of Fluorine Chemistry Co. , Ltd. Zhejiang Quhua containing chloroform (chloroform) and carbon tetrachloride (carbon tetrachloride) wastewater study on the basis of the results of a small pilot study , analyzed and studied the catalytic reduction of iron under the conditions of the pilot the flocculated wastewater treatment effect , optimizing the wastewater treatment process parameters , and this kind of method for treating wastewater economy was evaluated . The experimental studies include : pilot experimental device intermittent and continuous experiments to study the effectiveness of iron reductive dechlorination , iron reductive dechlorination process parameters to determine and optimize the catalyst on the catalytic dechlorination effect neutralization and flocculation process for removing methyl chloride , etc. , to determine the preferred pilot experimental conditions . Continuous run in the 2-3 pH of acidic wastewater , scrap iron dosage of 2 kg / per tonne of waste water ; lower wastewater pH (pH lt ; 3 ) should use 20 to 30 mesh iron powder GT ; at high pH (pH 3 ) selected from 40 to 60 mesh iron filings ; help reaction catalyst is added , preferably the dosage of 1 kg / ton of wastewater . In the above - described experimental conditions , the reduction treatment of the wastewater electricity carbide slag processed further , making the iron ions in the waste water in the flocculation effect , can reach 60 to 95% removal of chloroform and carbon tetrachloride in the final effluent . When the chloroform and carbon tetrachloride , methyl chloride wastewater concentration between 10 ~ 25mg / L of carbon tetrachloride restore the water concentration of 2 to 5 mg / L, the the chloroform effluent concentration of 5 to 10mg / L , after and flocculation process , the final effluent in about 2mg / L . When the influent carbon tetrachloride is less than 10mg / L , the effluent 2mg / L or less. Pilot experimental results show that the homogeneous catalytic reduction of iron - in the flocculation process for methyl chloride wastewater treatment of Zhejiang Quhua Fluorine Chemistry Co., Ltd. , chloroform and carbon tetrachloride in the wastewater to efficiently remove removal efficiency reaches 60 to 95%, and to verify the test results of a small test to obtain the desired effect . The results of the pilot can be used as a wastewater treatment capacity of 60,000 tons / year of engineering design basis .

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > Chemical industry,waste disposal and comprehensive utilization > Organic Chemistry Industry
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